Ronnie Ortiz-Magro and Jen Harley are like a broken record, and a trip to Disney World’s not going to fix it … so say sources close to the volatile pair.

We broke the story … the ‘Jersey Shore’ star and his baby mama looked more like they were going to prison than vacay early Wednesday morning as they boarded a flight from Las Vegas to Florida with their daughter. They didn’t sit together or speak on the flight.

We’re told the separate seating was due to booking last minute — but seeing the moody duo together definitely raised eyebrows.

Our sources tell us looks do not deceive — Ronnie and Jen are still far from being solid in their relationship and are “on and off” on a weekly basis. We’re told family and friends close to them are very concerned and fear things will take another violent turn at any moment.